Question

The distance between a speaker and a listener is 8.0 m. Determine the frequency of the sound wave if exactly 20 waves are formed before sound reaches the listener.

Answer 1

Step-by-step explanation:

Wavelength of a wave is length of a complete wave. length of complete wave is length of two closest points on a wave which are having same phase . It may be distance between two consecutive crest or two troughs etc.

The length of 20 waves as per given data is 8 m .

length of one wave = 8 / 20

= 0.4 m .

wave length of sound = 0.4 m

frequency = velocity of sound / wave length

= 340 /.4

850 Hz .